Insulator-threading machine



Dec. 29 1925. 1,567,027

c. VAN p. BENNETT INSULATOR THREADING MACHINE Filed Oct. 10, 1923 3 Sheets-Sheet 1 .1 INVENTOR.

3 Sheets-Sheet 2 C. VAN D. BENNETT INSULATOR THREADING MACHINE Filed Oct. 10, 1923 Dec; 29, 1925- %15 ATTORNEY 3 Sheets-Sheet 5 C. VAN D. BENNETT INSULATOR THREADING MACHINE Filed Oct. 10, 1923 Dec. 29 I 1925.

Patented Dec. I 29, 1925'.

UNITED STATES PATENT. OFFICE.

CORNELIUS van em summit, or time, new YORK, assronon To run PORCELAIN INSULATOB oonronnrron, 01' LIMA, NEW storm, 4 CORPORATION or NEW YORK.

msnLaroa-rmanme macnnm.

Application filed October 10, 1923. Serial 110'. $67,761.

To all whom it may concern.

Be it known that I, Oonmmrus VAN DYKE BENNETT, a citizen of the United States of America, residing at Lima, the county of Livingston and State of New York, have in-' vented certain new and useful Improvements in Insulator-Threading Machines, of which the following is a specificatlon;

My invention relatesto an insulator threading machine, more particularly of the general type in which a threading tool is moved downwardly into the central opening of an insulator or plastic body and then actuated horizontally to bring the tool into engagement with the adjacent surface of the insulator or plastic body, after which the parts are turned in suitable fashion to impress the thread upon the interior surface of the insulator.

A particular purpose of my invention is.

- to afford simple and practicable mechanism for controlling the vertical and horizontal movements of the threading tool, so as to insure the latter reaching its lowermost position in the insulator before being moved horizontally, and vice versa on its withdrawal from the insulator.

A further object of the improvement is to afford means whereby the operator can very readily bring the threading tool into proper osition with reference to the insulator, and

P get with great accuracy, thereby insuring a igh degree of'perfection in the thread be formed. b

- Still an additional andimportant feature of the invention is the provision of'means for readily adjusting the extent of horizontal movement of the threading tool to a fine degree so as to adapt B/ mtmlIlDE readily, but with great efficiency, tofiii's ulators of differ ent sizes or with different sized openings. 'lhe invention also comprehends certain other advantages and detailed improvements, all of which will appear clearly from the following description when read in conjunction with the accompanying drawings. the novel features being pointed out in the claims following the specification.

In the drawings:

Figure 1 is-a side elevation of an insulator threadin'gj machine, showing one adaptation of the invention in a preferred embodiment, and with the threading tool in uppermost position;

Figure 2 is a similar view showing the position of the parts after the. threading tool has been moved downwardly to its lowermost position with reference to the insulator, but before horizontal movement;

Figure 3 is an enlarged central sectional view of a portion of the machine, showing the position of the parts as in Figure 2;

Figure 4 is a sectional view similar to Figure 3, and showing the position of the parts after the threading tool has been moved horizontally to bring it into threads ing engagement with the wall of the insulator; I

Figure 5 is a sectional view on the line 5- 5 of Figure 3;

Figure 6 is a horizontal sectional view on the line 6--6 of Figure 3;

Figure 7 is a vertical sectional view on the line 7-7 of Figure 6, and

Figure 8 isv a perspective view of one of the horizontally'movable blocks which supports the threading tool.

insulator, rotating the threading tool about its own axis, and also revolving the threading tool about the center of the insulator. In the structure of'the present application. the revolving motion does not occur, and during the threading operation there are only twomotions, namely, rotation of the.

insulator and rotation of the threading tool about their respective axes, and the novelty in the presentcase lies in the mechanism for im arting the necessary downward and latera movements to the threading tool, to and fromthreading position, while the principal novelty-of'my earlier application resided in thee-mechanism for revolving the threading tool while at the same time rotating it about its axis.

Referring generally to Figures 1 and 2,

ing operation was e acted by rotating the the mechanism which I have chosen as illusa trat'ive of one embodiment of the invention includes a base land upright 'portidn 2, while 3 is a rotary", table or support for re ceivingi the insulator 4 or other plastic body to be threaded. The support 3 is carried on a rotary vertical spindle -5 having keyed thereon a bevel pinion v6-driven by-a bevel. pinion7 on-the'shaft 8. The latter is con nected with vertical shaft 9 through bevel pinions 10-and'11', while 12 designates. the -main power shaft connected with the vertical shaft-9 by-bevel pinions 13 and 14, powerbeing imparted to the shaft 12 through the pulley 15 from any suitable source.

- The threading tool includes a vertical shaft having a threading member 21 at the lower end thereof for threading engagment with'the insulator 4, as illustrated in Figure 3. The shaft 20 of the threading tool has splined thereon a sleeve 22 which carries preferably-asan integral part thereof a bevel j inion 23, the latter engaging a cooperating evel' pinion 24 which is journalled in a bracket 25, and splined on the powershaft 14.

In the? usual operation. of the mechanism, Y an insulator is firstpositioned as in Figure 1, and power applied to the machine to rotate the threading tool and insulator, preferably at the same number of turns per minute. The threading tool is then moved downwardly as in Fi res 2 and 3 to its lowermost, .osition, f0 lowing which it is actuated later y' into enga ement with the wall of the insulator, as s own in Figure 4, and when the thread is completed, the reverse movement 1 takes place to withdraw the threading tool from the insulator. The partsfor governing the vertical travel and the means for effecting horizontal movements of the threading tool will now be de;

scribed.-

The horizontal actuating means includes generally a pair of blocks 26 and 27 in ing movement, said blocks havin suitable guidesor flanges 28 engaging ideways in the stationary arms 29 carried y the frame the links 35 which in turn are pivotally connected to hell crank levers 36 which are pivotally mounted on'stationary lugs 37. 38 designates a control member in the form of "lly connected to the outer ends rank levers 36, and 39 is a ted at one end to said rod 38 40, and actin normally to move said rod 38 downward y, as shown in Figure 4, and

downward movement of the threading tool.

With the parts related as'just described,

.which. shaft 20 is mounted for vertical slidsaid arms 29. The

The blocks 26 and 27 have pivoted thereto see Figures 3 and 6. Thestop device 61 has 'swivelled to the stop evice 61 and in 161" end to a stationary plate.

thereby actuate the threading tool horizontoolwith the horizontal actuating means includes a flexible member or cable 47 passing over said pulley 45 and connected at one end to the threading tool or vertical shaft 20,

and at its opposite end to the rod 38. 48

' designate a series of weights preferably arranged at the upper'end of the shaft 20,

86 whereby the threading tool drops by gravity when released, and 49 is a collar that is adjustably fixed on the shaft 20 and coopcrates with a stationary collar 50 to limit the threadin tool is moved into operative position by rst lowering the. cable'46 and. pulley 45 from the posit-ion illustrated in Figure 1 to that illustrated in Figure 2. The weight of the threading tool and weights 48 being greaterthan the action of spring 39, causes the threading tool to move downwardly until the collar 49 strikes collar 50. The threading tool is then at the limit of its downward travel, and further lowering of the pulley 45 permits lowering of the rod 38 under the action of spring 39. The rod 38 thus moving downwardly operates the bell crank levers 36 and moves the blocks 26 and 27 horizontally, and with them the shaft 20, bringing the threading tool into operative or threading position, as shown in Figure 4. The return movement of the parts is accomplished by. elevating the cable 46 and pulley 45, and the initial; upward movement of these parts first causes the rod 38 to be moved upwardly, retractingshaft 20 to its centralposition, after which it is .moved Vertically out of the insulator.- I

It is particularly desirable and important to limit the horizontal movement of the threading tool accurately, and also to provide for a fine adjustment of such horizontal movement of the tool to accommodate different sizes of insulators or different sized. openings; This result is brought about by securing to the lower block 27 a stop plate 60 which engages a stop device61 which may be controlled by a fine-adjustment mechanism. This is preferably accomplished by, making the stop device 61 in the form of a wedge or tapered member, as illustrated in Figure. 6, and slidable in guideways 62,

connected thereto a ost 63, preferably ing a threaded portion 64 and dial pla while 66 is a post having the threaded o" .p ing engagedby the stem 64.- 67'is a knurled head or finger piece mounted on' the post ($3, and 68 is a stationary scale cooperating with the dial plate 65 and affording means for accurately adjusting the stop device. By turning the knurled head 67, the stop device 61 is adjustable inw'ardl or outwardly, with reference to the stop p ate 60, and in this manner, the amountof horizontal movement of the threading toolcan be accurately determined and finely adjusted.

The structure shown may be variously modified without departing from the underlying invention, and this application is intended' to cover any changes or adaptations coming within the intent of my invention or the scopeof the following claims.

I claim:

1. In an insulator threading machine, the combination with a threading tool movable in aplane vertically and horizontally at a right an le-to its vertical travel, of means for effecting such horizontal movement, said means being -automatically Y brought into operation at a predetermined point in the vertical travel ot the threading tool.

2. In an insulator threading machine, the

combination with a threadingtool movable in a plane vertically and horizontally at a right angle to its vertical travel, of means for effecting such horizontal movement, and devices connecting said means -.with the threading tool. whereby said horizontal movement takes lace after the tool reaches the limit of its downward travel or before commencing its upward travel.

' v 3. In an insulator threading machine, the

- combination with a threading tool movable vertically and horizontally at a right angle to its'vertical travel, of means for adjust= ablylimiting said horizontal movement.

4; In an insulator threading machine, the

combination with a threadin tool movable vertically and horizontally, o a stop device adjustable to different positions forvaryin the extent of said horizontal movement, an fine-adjustment means controlling the posi- 'tion of said sto device. I

5. In an .insuiii combination with a threadin toolmovable vertically and horizontally, 0 means for effecting said horizontal movement, and an elevating device connectedto the threading tool and to said horizontal actuating means and actin initially to permit movement of the three ing tool to its lowermost position and. thereafter bring into operation said horizontal actuating'means for moving the tool horizontally.

6. 'In an insulator, threading machine, the combination with a threading tool movable vertically and horizontally, means for effectin' said horizontal movement, and an elevating device includingal'vertically I novable pulley, and a flexible connection passing over said pulley and having one end contor threading machine, the

' which normally holds such parts inoperative, 7

and an elevating device including a pulley, and a flexible member passing around said pulley and having one end connected to the threading tool while its opposite end is connected to said control member, whereby the 30 latter is released to permit operation of the horizontal actuating means when the threading tool reaches its lowermost position.

8. In an insulator threading machine, the combination witha rotary threading tool movable vertically .and horizontally, of means for efiectin such horizontal movement while the too is rotating,; said means being automatically brought into operation at a p'redeterminedpoint in the vertical travel of the threadin tool.

9. In an insulator t readin machine, the combination with a rotary t reading tool movable vertically and horlzontally, of fineadjustment means for adjustably limiting said horizontal movement.

10. In an insulator threading machine, the combination with a rotary threading tool movable vertically and horizontally, of I means for efi'ectlng such horizontal movemo ment, said means being automatically brought into operation at a predetermined point in the vertical travel of the threading tool, and fine-adjustment means for adjustably limiting such horizontal movement.

11. In an insulator threading machine, the combination with a rotary threading tool movable vertically and horizontally, of means for efi'ecting said horizontal movement while the tool is rotating, and an elevating device connected to the threading tool and to said means and acting initially to permit movement of the threading tool to its lowermost position, and thereafter bring into operation said horizontal actuating means for moving the tool horizontally.

12. In an insulator threading machine, the combination with a rota threading 'tool movable vertically and horizontally, of

means for effecting said horizontal movement while the .tool is rotating, an elevating device connected to the threadin tool and to said means and acting initia ly to ermit movement of the threading toolto its 'owermost into operationv said horizontal actuating position and thereafter bring means for moving the tool horizontally, and fine-adjustment means for adjustably limiting said horizontal movement. 1

13. In an insulator threading machine, the 1 combination with a rotary threading tool movable in a plane vertically and horizontally, of means for effecting such horizontal I movement automatically at a predetermined pOlilt in the vertical travel of the threading too o 14. In an insulator threading machine,'the combination with a rotary threading 'tool movable in a plane vertically and horizontally at a right angle to its vertical travel, of means for efl'ecting such horizontal movement automatically at a predetermined point in the vertical travel of the threading tool.

In witness whereof, I have hereunto signed my name.

. CORNELXUS VAN DYKE BENNETT. 

